Abstract
Acoustic Black Hole (ABH) has been attracting the ever-increasing attention from the scientific community as a passive, effective and lightweight solution for vibration and noise mitigations of vibrating structures. Most existing work, however, relies on numerical simulations using Finite Element models, except a few cases where alternative methods are attempted. In general, there is a lack of well-calibrated experimental benchmark solutions for model validations and phenomena assertions, especially in 2D cases where precise fabrication of ABH indentations with well-controlled thickness profile is a challenge. In this paper, a rectangular plate embodied with a symmetric circular ABH indentation is meticulously manufactured and experimentally tested in terms of eigen-frequencies, mode shapes, forced vibration response and radiated sound power in a baffled half-space. These results offer useful benchmark solutions for future ABH studies. In particular, experimental results show a high consistency with the ones predicted by the previously developed 2D Daubechies wavelet (DW) model.
Original language | English |
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Article number | 107223 |
Journal | Applied Acoustics |
Volume | 163 |
DOIs | |
Publication status | Published - Jun 2020 |
Keywords
- Acoustic Black Hole (ABH)
- Benchmark solutions
- Daubechies wavelet (DW) model
- Vibration and noise control
ASJC Scopus subject areas
- Acoustics and Ultrasonics